JP2004316841A - Crushing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a crushing device capable of effectively providing crushing force in minimum size. <P>SOLUTION: This crushing device 3 comprises a plurality of hydraulic pressure cylinder devices having hydraulic pressure cylinder bodies, pistons 41A, 41B, 41C, and 41D reciprocatingly and slidably inserted in cylinder bores in B1 and B2 directions so that displacement fluid chambers 33A, 33B, 33C, and 33D can be formed in the cylinder bores 31A, 31B, 31C, and 31D, and piston rods 42A, 42B, 42C, and 42D connected, at one end, to the pistons, extending to the opposite side of the fluid chambers along the cylinder bores, and projected to the outside of the cylinder bores. Crushing tools 50A, 50B, 50C, and 50D are formed at the projected ends of the piston rods, the hydraulic pressure cylinder bodies of the plurality of hydraulic pressure cylinder devices are integrally fixed to each other as cylinder blocks 30, and the displacement fluid chambers of the plurality of hydraulic pressure cylinder devices communicate with each other through communication passages 35A, 35B, 35C, and 35D. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a crushing device for crushing an object by fluid pressure, for example, to a crushing device suitable for crushing an information recording medium such as a hard disk (magnetic disk) device.
[0002]
[Prior art]
Since a large amount of confidential information can be included in an information recording medium such as a hard disk device, leakage of the recorded information when discarding the information recording medium such as a hard disk device has become a problem from the viewpoint of security.
[0003]
When discarding an information recording medium such as a hard disk device, it is fundamental to erase the recorded information. However, erasing the recorded information is not only troublesome and time-consuming, but also it is not always easy to completely erase the recorded information so that it becomes substantially unreadable. It is also not easy to confirm that the record information has been completely erased. Furthermore, in the case of the erasing process, it is not possible to determine whether or not the erasing of the recorded information has been completely performed based on the appearance alone, so that care must be taken in managing the processing history.
[0004]
On the other hand, recently, commercialization of a hard disk breaking device (hard disk crusher) including a hydraulically driven cylinder device has been reported (Non-Patent Document 1). As long as it can be understood from Non-Patent Document 1, this hard disk destruction device is a device in which one hydraulic cylinder makes two through holes in a hard disk device, and one hydraulic cylinder has a rod-shaped drilling tool or head called a punching head. Are attached.
[0005]
[Non-patent document 1]
Japan Pulse Technology Laboratory Co., Ltd. "Hard Disk DATA TERMINATOR DT-2000" (product catalog)
[0006]
[Problems to be solved by the invention]
However, in a hard disk destruction device in which two rod-shaped punching heads are connected to a piston rod of one hydraulic cylinder via a connecting mechanism such as a slide plate, the two rod-shaped punching heads are hardened or mechanically damaged. When the two rod-shaped punching heads are pressed against two parts having different target strengths, the two rod-shaped punching heads receive different loads or reaction forces from the object to be destroyed, so that an uneven load is applied to the slide plate connecting the punching heads. Therefore, if the strength of the slide plate is low, bending stress may be applied to the slide plate and the slide plate may be damaged. To avoid this, the slide plate is formed into a thick block shape and the slide guide (support) portion is provided. If the strength is to be increased, the size of the device may be increased. In particular, when trying to allow a variety of objects as crushable objects, it is inevitable that the apparatus be enlarged.
[0007]
The present invention has been made in view of the above points, and an object of the present invention is to provide a crushing device capable of effectively applying a crushing force with a minimum size.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, a crushing device of the present invention includes a fluid pressure cylinder main body and a piston reciprocally slidably inserted into the cylinder hole so as to form a variable volume fluid chamber in the cylinder hole of the main body. A crushing device comprising a plurality of hydraulic cylinder devices each having a piston rod connected at one end to a piston and extending along a cylinder hole on a side opposite to the fluid chamber and projecting outside the cylinder hole, wherein each piston rod has a protrusion. A crushing tool is formed at the end, the hydraulic cylinder bodies of the plurality of hydraulic cylinder devices are integrally fixed to each other, and the variable volume fluid chambers of the plurality of hydraulic cylinder devices are communicated with each other.
[0009]
In the crushing device of the present invention, since "the crushing tool is formed at the protruding end of each piston rod of the plurality of hydraulic cylinder devices", the crushing force of the crushing tool can be supported by each hydraulic cylinder device. Further, in the crushing device of the present invention, since “the fluid pressure cylinder bodies of the plurality of fluid pressure cylinder devices are fixed integrally with each other”, the crushing force is reduced by the fluid pressure cylinder bodies fixed integrally with each other. Can support. Furthermore, in the crushing device of the present invention, "the variable volume fluid chambers located on the side opposite to the destruction tool among the plurality of fluid pressure cylinder devices are communicated with each other." The object to be crushed can be crushed with a crushing force corresponding to the cross-sectional area of the pressure piston.
[0010]
In the crushing device of the present invention, in particular, since each crushing tool is supported by each fluid pressure cylinder device, even if the hardness and the mechanical strength of the crushable material differ depending on the crushable portion of the crushable material, The crushing force defined by the corresponding hydraulic cylinder device can be substantially independently applied to each of the crushed portions. Therefore, the fluid pressure cylinder bodies fixed integrally with each other only receive a reaction force corresponding to the oil pressure at the time of crushing, and variations in hardness and mechanical strength of the corresponding crushable portion of the crushable object are plural. Since the piston rod of the cylinder device can be absorbed by the variation in the protruding length of the piston rod, there is little possibility that an unbalanced load is applied to a portion where the fluid pressure cylinder body is integrated, and there is a possibility that a lateral force is applied to the extending direction of the rod. Is small, it is possible to exert a predetermined crushing force even when the part formed by integrating the fluid pressure cylinder main body is relatively small (when the same crushing force is exerted). In addition, since the variable volume fluid chambers of the plurality of fluid pressure cylinder devices communicate with each other, it is only necessary to control the fluid pressure supplied to the common port, so that operation control can be easily performed.
[0011]
For example, when the object to be crushed is a hard disk drive, the crushing strength is different between a head for reading information on the hard disk, a support arm portion of the head, a rotation support portion of the arm, and a portion without the support arm. Even if one of the plurality of crushing tools hits the head support arm or the head and ends without piercing the arm or the head, the other crushing tool of the plurality of crushing tools may have the head supporting arm or the head. The same portion of the hard disk can be crushed with similar crushing force in the non-existent area. In this crushing, the extension (projection) length of the piston rod abutting the head support arm or the head is the extension length of the piston rod equipped with a crushing tool that has penetrated the corresponding portion of the hard disk in a region without the head support arm or the head. It will be shorter than that. Even if the degree of crushing varies depending on the part as described above, in the crushing tool of the present invention, since each crushing tool is mounted on each separately extended piston rod, the combined body portion of the cylinder body is Since a constant reaction force depending on the pressure of the working fluid is received, there is little possibility that the coupling portion of the cylinder body receives an unexpected lateral force.
[0012]
Here, the plurality of hydraulic cylinder devices typically have substantially the same shape and strength as one another. Therefore, typically, the pressure receiving areas of the pistons are substantially the same, and the thickness and the length of the piston rod are also substantially the same. However, if desired, the sizes of the piston and piston rod may be different from each other. In that case, the cylinder body is also configured to have a strength corresponding to the pressure receiving area of the piston or the like.
[0013]
The plurality of hydraulic cylinder devices are typically arranged such that their piston rods project in parallel and in the same direction. However, if desired, some of the plurality of piston rods may be configured to project in parallel and opposite directions to other piston rods. It may extend non-parallel.
[0014]
When a plurality of hydraulic cylinder devices are arranged in parallel with each other, they are arranged relative to one another at appropriate intervals in consideration of the assumed size of the crushable object and the spread of the crushable region. For example, when there are two hydraulic cylinder devices, the distance between them is so large that even the smallest crushable object can damage the two crushable portions, and they are arranged at a certain distance. On the other hand, when there are three or four fluid pressure cylinder devices, they are typically arranged concentrically at equal intervals. However, if desired, they may be arranged in a single line or on another basis such as along two concentric circles. When there are five or more hydraulic cylinder devices, they are typically equally spaced from each other so as to cover the desired area evenly. When the object to be crushed is a rotating body such as a hard disk of a hard disk device, the crushable object is disposed at a position away from the center axis thereof so as to damage the information recording surface of the hard disk.
[0015]
Hydraulic cylinder devices typically include a piston rod on only one side of the piston. However, if desired, a piston rod may be mounted on the other side of the piston.
[0016]
When the hydraulic cylinder device is a single-acting hydraulic cylinder device, the hydraulic cylinder device includes a return spring that acts in a direction to retract the piston rod into the cylinder hole. Note that the fluid pressure cylinder device typically includes a stopper that limits the movable range of the piston in the protruding direction of the piston rod. However, when the piston rod or the like has sufficient rigidity, the stopper may not be provided.
[0017]
When the fluid pressure cylinder device is a double-acting fluid pressure cylinder device, the fluid on the opposite side to the fluid chamber (hereinafter also referred to as the rod-side fluid chamber) through which the piston rod with the crushing tool attached to the tip projects through. The chamber (hereinafter also referred to as a head-side fluid chamber) typically communicates with each other at a portion where the hydraulic cylinder bodies are integrally fixed to each other or at a head portion of a crushing device to which the portion is attached. The head portion of the crushing device is formed with a head-side common port that collectively supplies and discharges hydraulic oil to and from a plurality of head-side fluid chambers. However, if desired, a head-side port for supplying and discharging hydraulic oil to and from the head-side fluid chamber of each fluid-pressure cylinder device is provided for each fluid-pressure cylinder device, and the head-side fluid chambers are interconnected by pipes. You may make it. The same applies to the rod-side fluid chamber. Typically, the fluid-pressure cylinder body is mutually connected to each other through a communication passage in a portion to which the fluid-pressure cylinder body is integrally fixed or a head portion of a crushing device to which the portion is attached. However, if desired, a pipe may be used to interconnect the rod-side fluid chambers.
[0018]
In the crushing apparatus of the present invention, typically, a crushable object disposing portion for disposing a crushable object is provided integrally with the cylinder body. However, if desired, the cylinder body may be configured to be fixed directly or indirectly to the crushable object disposition.
[0019]
In other words, the crushing device of the present invention is configured such that a cylinder block in which a plurality of cylinder holes mutually connected by a communication port at one end side is formed, and a fluid chamber including the communication port is formed in each cylinder hole. A piston which is reciprocally slidably inserted into each cylinder hole, a piston rod connected at one end to the piston and extending along the cylinder hole on the side opposite to the fluid chamber, and protruding outside the cylinder hole; And a crushing tool formed at the projecting end of the crushing tool.
[0020]
In this case, the crushing apparatus of the present invention typically includes a crushable object disposing portion for disposing the crushable object integrally with the cylinder block.
[0021]
In the crushing device of the present invention, typically, the crushable object disposition portion is the information recording medium disposition portion. However, the crushing device of the present invention can be used for crushing any other crushable object, and can also be used for crushing an object having much higher rigidity than the information recording medium. The material to be crushed may be thick or thin, and in some cases, the thickness may be different depending on the part.
[0022]
In the crushing apparatus of the present invention, hydraulic pressure is typically used as the fluid pressure, but other fluid pressures such as air pressure may be used when the strength of the crushed object is relatively small.
[0023]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, a preferred embodiment of the present invention will be described based on a preferred embodiment shown in the accompanying drawings.
[0024]
【Example】
A hard disk crushing device 1 as a crushing device according to a preferred embodiment of the present invention has a crushing device main body 3 disposed in an outer case 2 of the device 1 as shown in FIGS.
[0025]
The crushing device main unit 3 includes a crushable object storage box 10 as a crushable object disposition unit, a crushing mechanism unit 20 fixed to the crushable material storage box unit 10, a crushing mechanism driving unit 70, and a control unit. 90.
[0026]
The crushing mechanism section 20 includes a cylinder block 30 having four cylinder holes 31A, 31B, 31C, and 31D (when not distinguished from each other or when generically denoted by reference numeral 31), and with corresponding cylinder holes 31A and 31B. , 31C, 31D slidably fitted in the directions B1, B2 in the directions B1, B2 (when not distinguished from each other or generically, they are represented by reference numeral 41) and pistons 41A, 41B, 41C, A piston structure 40A, 40B, 40C, 40D (not distinguished from each other or generically) provided with piston rods 42A, 42B, 42C, 42D extending from 41D (when not distinguished from each other or collectively referred to as 42). And the piston rod 42 of the piston structure 40A, 40B, 40C, 40D. , 42B, 42C, 42D, crushing tool parts 50A, 50B, 50C, 50D (represented by reference numeral 50 when not distinguished from each other or collectively referred to) and pistons 41A, 41B, 41C, 41D with B2. The pistons 41A, 41B, 41C, and 41D and the opposing concave portions 11A, 11B, 11C, and 11D of the crushable object accommodating box portion 10 in the cylinder holes 31A, 31B, 31C, and 31D of the cylinder block 30 in order to exert a biasing force in the directions. And return springs 60A, 60B, 60C, and 60D (when not distinguished from each other or generically, they are represented by reference numeral 60).
[0027]
Here, the crushing mechanism section 20 has four hydraulic cylinder devices 20A, 20B, 20C, and 20D integrally incorporated in a cylinder block 30 in which the cylinder device main bodies 30A, 30B, 30C, and 30D are integrated. The hydraulic cylinder device 20A has a cylinder device main body 30A formed of a portion surrounding the cylinder hole 31A of the cylinder block 30, and a piston portion 41A is slidably fitted in the B1 and B2 directions in the cylinder hole 31A of the main body 30A. The hydraulic cylinder device 20B includes a cylinder device main body 30B which is a portion surrounding the cylinder hole 31B of the cylinder block 30, and a piston portion 41B is provided in the cylinder hole 31B of the main body 30B by B1, B2. The hydraulic cylinder device 20C comprises a cylinder device main body 30C comprising a portion of the cylinder block 30 surrounding the cylinder hole 31C, and a cylinder hole of the main body 30C. A piston 41C is slidably inserted in the B1 and B2 directions into the piston 31C. The hydraulic cylinder device 20D includes a cylinder device main body 30D including a portion surrounding the cylinder hole 31D of the cylinder block 30, and a piston portion 41D is provided in the cylinder hole 31D of the main body 30D in the B1, B2 direction. And a piston structure 40D slidably fitted in the piston structure 40D.
[0028]
Ends of the cylinder holes 31A, 31B, 31C, 31D facing the back surfaces 41aA, 41aB, 41aC, 41aD of the pistons 41A, 41B, 41C, 41D (represented by reference numeral 41a when they are not distinguished from each other or are collectively referred to as 41a). On the wall 32, oil chambers (head-side oil chambers) 33A, 33B, 33C, 33D as volume variable fluid chambers formed on the back side of the pistons 41A, 41B, 41C, 41D (when not distinguished from each other or collectively referred to) The hydraulic oil supply / discharge holes 34A, 34B, 34C, 34D (when not distinguished from each other or when collectively referred to by the numeral 34) are formed as communication ports opened at the time when the hydraulic oil is supplied. The discharge holes 34, 34B, 34C, 34D are communicated with the main supply / discharge holes 35 extending in a cross shape in the end wall 32. The main supply / discharge hole 35 includes holes 35A, 35B, 35C, and 35D. The holes 35A, 35B, 35C, and 35D are communicated with each other at base ends 35aA, 35aB, 35aC, and 35aD. 34D communicates with the base end. In this example, the holes 35A and 35C are linearly aligned with each other, and the holes 35B and 35DB are linearly aligned with each other.
[0029]
One of the holes 35A and 35D (the hole 35D in the illustrated example) is provided at a base end located on the side wall 30a of the cylinder block 30 so as to define a hydraulic oil main supply / discharge port or supply / discharge port 36. It is open at 30a.
[0030]
The piston 41 has a seal ring mounting groove 41b on the outer periphery, and a seal ring 41c is mounted in the seal ring mounting groove 41b. The seal ring 41c includes, for example, an O-ring and a backup ring. However, as long as the oil chamber 33 can be sealed on the sliding surface of the piston 41, the seal ring 41c may be a packing.
[0031]
A stopper 44 that abuts on the rod-side end surface 41d of the piston 41 and limits the displacement of the piston 42 in the B1 direction is provided at the opening on the piston rod side of each cylinder hole 41.
[0032]
The crushable information recording medium storage box 10 as a crushable object storage box portion is formed of a rectangular parallelepiped storage container having an opening 12 serving as a crushable substance insertion port on one side surface, and the side surfaces other than the opening 12 are: The walls 11, 13, 14, 15 and 16 are provided. The cylinder block 30 of the crush mechanism 20 is firmly fixed to one of the four walls 11, 13, 14, 15 around the opening 12, and the cylinder block 30 of the crush mechanism 20, the box 10 and Constitute an integral frame. Note that other wall portions may be omitted as long as the cylinder block 30 and the bottom wall portion 14 of the storage box 10 can be integrated sufficiently firmly to support the crushing force.
[0033]
The wall portions 11 are provided at positions corresponding to the piston rods 42A, 42B, 42C, and 42D and the crushing tools 50A, 50B, 50C, and 50D (when not distinguished from each other or collectively referred to as crushing tool passage holes 17A, 17B, 17C, and 17D). The recesses 11A, 11B, 11C, and 11D are formed around the holes 17A, 17B, 17C, and 17D on the surface of the wall 11 facing the cylinder block 30. Have been. In the illustrated example, the hole 17 has the same size as the cylinder hole 31, but depending on the size of the crushing tool 50, the hole 17 may be larger or smaller than the diameter of the cylinder hole 31, and its cross-sectional shape may be different. Instead of a circle, other shapes may be used.
[0034]
The wall portion 14 facing the wall portion 11 via the crushable information recording medium storage region 18 faces the holes 17A, 17B, 17C, 17D, and has a receiving portion in an area for receiving the tools 50A, 50B, 50C, 50D. 19A, 19B, 19C, and 19D (when not distinguished from each other or when collectively referred to, they are represented by reference numeral 19). In this example, the crushing tool 50 is formed of a conical end at the tip of the piston rod 42, and the receiving portion 19 is formed of a conical recess substantially complementary to the tip shape of the crushing tool 50. The distal end bites into the conical recess 19 or the crushable object W is bitten into the recess 19. The shape of the receiving portion 19 may be different from the shape of the tip portion of the crushing tool 50 in consideration of the deformation of the crushable object W.
[0035]
In addition, the shape of the tip of the crushing tool 50 may be other shapes such as a tip having a rounded shape such as a sphere or a hemisphere or a small flat shape such as a truncated cone instead of a sharp cone. Good. Instead of being formed integrally with the tip of the piston rod 42, the crushing tool 50 may be separately formed and attached to the tip of the piston rod 42. The receiving portion 19 has a shape suitable for applying a large local compressive stress to a portion of the crushable tool 50 located between the receiving portion 19 and the distal end portion of the compression tool 50 to crush the portion. Can be selected.
[0036]
The plurality of crushing tools 50A, 50B, 50C, 50D are typically all formed in the same shape and size, but in some cases, some or all have different shapes and / or sizes. Is also good.
[0037]
The stopper 44 described above is used, for example, when the tip of the crushing tool 50 actually comes into contact with the concave receiving portion 19 or reaches a position facing the concave receiving portion 19 through a slight gap. By contacting the end surface 41d, the displacement of the piston 41 in the B1 direction is stopped. However, when the piston rod 42 and the receiving portion 19 of the box 10 have sufficient mechanical strength, the stopper 44 may not be provided.
[0038]
The crushing mechanism driving unit 70 includes an oil reservoir (not shown) for hydraulic oil, a hydraulic pump body (not shown), and a return valve (not shown) for opening and closing a return flow path of hydraulic oil to the oil reservoir. The hydraulic pump unit 80 includes a hydraulic pump unit 80 and an electric motor 71 that drives a hydraulic pump body of the hydraulic pump unit 80. The return valve comprises, for example, a solenoid valve. The hydraulic oil supply / discharge port of the hydraulic pump unit 80 and the hydraulic oil supply / discharge opening or push port 36 of the cylinder block 30 of the crushing mechanism 20 are connected and communicated with each other by a hydraulic hose 83. 1 and 2, 4 is an on / off switch of the main power supply, 5 is a start button of the motor 71 and the hydraulic pump unit 80, 6 is an emergency stop button, and 7 is to take out the crushable object W from the housing recess 18. A dust tray 8 receives debris and the like falling down at the time, and a handle 8 is held during carrying.
[0039]
The control unit 90 including an electric control circuit and the like includes a timer circuit. When the start button 5 is pressed while the main power switch 4 is turned on, the electric motor 71 and the hydraulic pump connected thereto are pressed. The hydraulic pump body of the unit 80 is started to start supplying hydraulic oil from the pump body to the port 36 of the cylinder block 30 via the hydraulic hose 82. The supply of the hydraulic oil is continued for a time T set in the timer circuit. When the time T has elapsed, the control unit 90 stops the electric motor 71 to stop the supply of hydraulic oil by the hydraulic pump body of the hydraulic pump unit 80, and sets the return solenoid valve of the hydraulic pump unit 80 to the open state. Thus, the return of the hydraulic oil from the port 36 of the cylinder block 30 to the oil reservoir of the hydraulic pump unit 80 via the hydraulic hose 82 is permitted.
[0040]
Next, the operation of the hard disk crushing apparatus 1 configured as described above will be described with reference to FIG. 4 in addition to FIGS. In FIG. 4 schematically showing the crushing device main body 3, the vertical direction in the figure is the sliding displacement direction B1, B2 of the piston structure 40 for easy viewing.
[0041]
First, the crushing device 1 is carried to a desired position with the handle 8 and disposed. Next, the main switch 4 is turned on. With the ON operation of the switch 4, for example, the return valve is opened under the control of the control unit 90, and the common push port 36 is connected to the oil reservoir via the hydraulic hose 82. In this state, the electric motor 71 and the pump unit 80 are not started, and no hydraulic pressure is applied to the common port 36 of the hydraulic cylinder devices 20A, 20B, 20C, and 20D. As described above, the piston structure 40 assumes the initial position D1 that is biased in the direction B2 by the spring 60. Initially, regarding that the piston structure 40 is at the initial position D1, for example, at the end of the previous operation of the crushing device 1, the return valve is opened, and accordingly, the piston structure 40 is returned to the initial position D1. May be considered.
[0042]
First, the hard disk drive W as a crushable object is inserted into the crushable object accommodating recess 18 from the crushable object insertion port or opening 12 (see FIGS. 2A and 2B). As shown in FIG. 4B, the hard disk drive W includes a relatively thick and relatively rigid portion W11 such as an arm portion having a head, a rotation support portion of the arm, and a rotation center shaft portion. And a portion W12 made of a relatively thin and relatively low mechanical strength such as a disk plate portion. Actually, various portions having different stiffnesses and thicknesses may be included, but here, for the sake of simplicity, a portion that is not easily crushed is denoted by reference numeral W11, and a portion that is easily crushed is denoted by reference numeral W12.
[0043]
In the example shown in FIG. 2, the crushable object accommodating portion 18 has an opening size suitable for inserting and disposing a so-called 3.5-inch hard disk device W used in a desktop personal computer or the like. However, the size of the crushable object accommodating portion 18 is set to a size capable of accommodating the largest crushable object W in accordance with the type and size of the crushable object W which can be the crushable object. Have been. The crushing mechanism 20 also includes a plurality of hydraulic cylinder device units 20A, 20B,... At appropriate intervals according to the size of the crushable object storage unit 18. In this example, since the hard disk device is assumed to be the main crushable object W, when the hard disk device W is inserted and disposed in the crushable object storage portion 18, the hard disk device W is located at a position to avoid the spindle axis of the hard disk device W. Hydraulic cylinder devices 20A, 20B, 20C, 20D are distributed so that the crushing tools 50A, 50B, 50C, 50D are located.
[0044]
Next, the start button 5 is pressed to start the electric motor 71 and the pump unit 80. When the return valve of the pump unit 80 is open, the return valve of the pump unit 80 is closed under the control of the control unit 90 at the time of this start instruction.
[0045]
When the pump unit 80 is started, hydraulic oil is introduced from the pump unit 80 through the hydraulic hose 82 to the common push port 36, and further, each hydraulic cylinder device communicated with the communication passage 35, that is, the passages 35A, 35B, 35C, 35D. The chambers 33 behind the cylinder holes 31 of the parts 20A, 20B, 20C, 20D, ie, 31A, 31B, 31C, 31D, ie, 33A, 33B, 33C, 33D, are supplied via supply / discharge holes 34, ie, 34A, 34B, 34C, 34D. ,be introduced. The hydraulic oil in each of the chambers 33A, 33B, 33C, 33D has substantially the same pressure. As the hydraulic oil is supplied to the chambers 33A, 33B, 33C, 33D, the respective piston structures 40A, 40B, 40C, 40D are simultaneously moved in the B1 direction.
[0046]
The B1 displacement or directional movement of the piston structures 40A, 40B, 40C, 40D is caused by the crushing tools 50A, 50B,... At the tips of the respective piston structures 40A, 40B, 40C, 40D. , 50C, and 50D in the protruding direction in the protruding direction, the type (the degree of rigidity) and the state of the crushable portions W11 and W12 differ.
[0047]
That is, for example, as shown in FIG. 4B, when the crushable portion at a position facing the crushing tool 50B of the piston structure 40B is a relatively thin and weak crushable portion W12, the piston structure 40B The crushing tool 40B extends in the B1 direction without any load until the tip of the crushing tool 50B contacts the thin crushed portion W12, and the tip of the crushing tool 50B is inserted into the crushed portion W12 with a relatively low load. Thus, the crushed portion W12 is crushed, and, for example, actually penetrates the crushed portion W12 and hits the receiving portion 19A and stops. During the extension operation of the rod portion 42B of the piston tool structure 40B in the B1 direction, until the pressure of the hydraulic oil reaches the maximum pressure, the crushed portion W12 is substantially completely pierced or not. The crushed portion W12 is practically completely crushed. In the example shown in FIG. 4B, although the end surface 41d of the piston 40B is not in contact with the stopper 44, the position where the end surface 41d contacts the stopper 44 substantially completes the crushing of the crushable portion W12. As the position, the movement of the piston 40B in the B1 direction may be stopped.
[0048]
On the other hand, for example, as shown in FIG. 4B, the crushable portion at the position facing the crushing tool 50D of the piston structure 40D is relatively thick and hard (high mechanical strength) the crushable portion W11. In this case, the rod portion 42D of the piston structure 40D actually extends in the B1 direction with no load until the tip of the crushing tool 50D comes into contact with the thick crushed portion W11. When the crushed portion W11 comes into contact with the crushed portion W11, the load is rapidly increased, and the crushed portion W11 is slightly dented and its extension in the B1 direction is prevented. As a result, when the pressure of the hydraulic oil reaches the maximum pressure, the piston structure 40D actually abuts on the crushable portion W11 without substantially crushing the crushable portion W11, thereby stopping the advance in the B1 direction. Can be
[0049]
As described above, as the hydraulic oil is pumped from the pump unit 80 to the common port 36 of the cylinder block 30, the hydraulic oil is introduced into the oil chambers 33B and 33D at the same pressure. When the hydraulic oil is introduced, the piston portion 41B is displaced in the B1 direction so that the piston rod 42B of the piston structure 40B protrudes largely in the B1 direction, so that a large amount of hydraulic oil is introduced into the oil chamber 33B. Since the piston rod 42D of the piston structure 40D only slightly projects in the B1 direction, a small amount of hydraulic oil is introduced into the oil chamber 33D. The pressure of the hydraulic oil in the oil chambers 33B, 33D, etc. is practically the same at each time. That is, in the hard disk crushing device 1, the body portions 30A, 30B, 30C, and 30D receive the same hydraulic pressure through the communication passage 35 as the integral cylinder device portions 20A, 20B, 20C, and 20D. The 40D rod portions 42B and 42D can be made to protrude independently of each other in the B1 direction according to the respective loads. As a result, while the crushing proceeds in accordance with the strength of the crushable portions W12 and W11, the cylinder block 30 depends on the pressure of the hydraulic oil substantially independently of the degree of protrusion or penetration of the crushing tools 50B and 50D. Therefore, there is no possibility that an uneven load is applied to the cylinder block 30.
[0050]
In the crushing apparatus 1, for example, although the crushing tool 50D does not directly contribute to crushing, when the crushing tool 50B or the like penetrates into the crushable portion W12 of the crushable material W, the crushing object W is removed. It also has a role of pressing, that is, a role of regulating the positional deviation of the crushable object W and assisting crushing by the crushing tool 50B or the like.
[0051]
Although the above description has been given of the example in which the crushable object W includes the portion W12 that is easily crushed and the portion W11 that is not actually crushed, actually, the crushability is between W11 and W12. Various parts will be mixed. However, the basic operation of the device 1 and its advantages are the same as those described above.
[0052]
In the above description, an example in which the crushable object W is relatively thick has been described. However, for example, as shown in FIG. It may be as thin as possible. In this case, for example, the rod portions 42B and 42D of the piston structures 40B and 40D provided with the crushing tools 50B and 50D of the cylinder device at the tip end are made to protrude in the B1 direction without a load for a long distance, and then the crushable object is formed. Then, the optical disk or the like in the form of the sheet-like disk (annular plate) is crushed or penetrated, and is pressed against the receiving portions 19B and 19D.
[0053]
In this case, for example, even if the crushed portion hit by the tool 50B and the crushed portion hit by the tool 50D are significantly different in strength and hardness, at least a portion having lower strength or hardness ( Or at least one of the crushed portions hit by the four tools 50A, 50B, 50C, and 50D) as long as the pressing force or the crushing force is large enough to be crushed by the corresponding tool. The strength may be different depending on the type.
[0054]
Although the crushing device 1 includes the four hydraulic cylinder devices 20A, 20B, 20C, and 20D, even if the crushable object includes the crushable portion W11 that is not easily broken, the crushable material is substantially reduced. The number of hydraulic cylinder devices may be two or three, or may be five or more, as long as a plurality of hydraulic cylinder devices 20A, 20B,.
[0055]
In the above, although the example in which each of the cylinder device main portions 30A, 30B, 30C, and 30D is a part of the integrally formed cylinder block 30 is described, the cylinder device main portions 30A to 30D are relatively formed. As long as they are firmly connected and fixed to each other so as to be immovable, they may be formed separately and connected and fixed to each other or to a common rigid frame. In that case, at least a part of the communication passage 35 may be formed by a hydraulic pipe instead of the internal passage.
[0056]
Although the example in which the hydraulic cylinder device is constituted by a single-acting hydraulic cylinder device has been described above, the hydraulic cylinder device is a double-acting hydraulic cylinder device as shown in FIGS. 5 (a) to 5 (c). There may be. In FIG. 5, elements or portions completely or almost the same as those shown in FIG. 4 and the like are denoted by the same reference numerals. On the other hand, parts that are partially different are denoted by a suffix q.
[0057]
That is, as shown in FIG. 5A, the oil chambers 37B, 37D, etc. are formed not only on the head side but also on the rod side by the pistons 41B, 41D, etc. of the respective piston structures 40B, 40D, etc. Instead, the hydraulic fluid is introduced into the rod-side oil chambers 37B, 37D, etc., whereby the piston structures 40B, 40D, etc. can be retracted in the B2 direction. 32qB, 32qD, etc. seal the cylinder holes 31B, 31D, etc., to form the rod side oil chambers 37B, 37D, etc., and the piston rod through holes through which the piston rod portions 42B, 42D, etc. penetrate in an oil-tight and slidable manner. It is an end wall provided with. Here, the hydraulic oil may be independently introduced into the rod-side oil chambers 37B, 37D, etc., such as the plurality of hydraulic cylinder devices 20qB, 20qD (when not distinguished from each other or collectively referred to as 20q). Typically, the rod-side oil chambers 37B, 37D, etc. of the plurality of hydraulic cylinder devices 20qB, 20qD, etc., are communicated with each other similarly to the head-side oil chambers 33B, 33D, etc. (Not shown) is supplied to a rod-side port 38 common to the plurality of rod-side oil chambers 37B, 37D and the like, and further connected to the port 38 from the common port 38 on the rod-side. The plurality of piston structures 40B, 40D, etc. are supplied to the plurality of rod-side oil chambers 37B, 37D, etc., which are communicated via the passage 39, and are simultaneously moved to the initial position D1 in the B2 direction. It is.
[0058]
In the crushing device 1q including the crushing device main body 3q having a plurality of such double-acting hydraulic cylinder devices 20qB, 20qD, etc., as shown in FIG. When the mechanical strengths of the crushable portions W11 and W12 are different, when the hydraulic oil is introduced into the head-side oil chambers 33B and 33D, the crushing tool 50B located at the weak crushable portion W12 causes the crushable portion W11. Is pressed into the crushed portion W12 in the B1 direction, and the crushing tool 50D located in the strong crushed portion W12 hits the crushed portion W11 and stays at the contact position, so that the cylinder block 30q actually applies an eccentric load. The crushable object W can be crushed without receiving it.
[0059]
When the main body 3q of the crushing device 1q is applied to the thin crushable object W as shown in FIG. 5C, similarly to the case shown in FIG. The object W can be crushed virtually independently at each site.
[0060]
Although the hard disk crushing apparatus has been described above, the crushing apparatus can be used for crushing other things as long as the crushing apparatus can be inserted into and removed from the accommodation recess 18 and has sufficient crushing force by hydraulic pressure. . If desired, the size of the housing recess 18 and the crushing device itself may be made larger or smaller. Further, the direction of the hydraulic cylinder device of the crushing device may be horizontal as shown in FIGS. 1 to 3 or up and down as shown in FIGS. 4 and 5, and if desired, may be inclined obliquely. Is also good.
[0061]
Although the example in which the pressure-applying fluid of the cylinder device is hydraulic oil has been described above, the pressure-applying fluid may be another liquid such as water, a gas such as air, or a gas-liquid mixed fluid instead of oil. In the case of a double-acting cylinder device as shown in FIG. 5, if desired, the pressure fluid introduced into the push port 36 and the pressure fluid introduced into the return port 38 may be different types of fluid.
[Brief description of the drawings]
FIG. 1 shows the appearance of a hard disk crushing apparatus according to a preferred embodiment of the present invention including a crushing apparatus main body according to a preferred embodiment of the present invention, wherein (a) is a plan view and (b) is a plan view. FIG. 2A is a side view of the apparatus viewed in the direction of arrow IB.
2A and 2B are imaginary lines showing a housed state or a built-in state of a crushing device main body and the like in the hard disk crushing device of FIG. 1, wherein FIG. 2A is a plan explanatory view similar to FIG. Side view explanatory drawing seen in the arrow IIB direction of (a).
3A and 3B show a crushing device main body accommodated in a case of the hard disk crushing device of FIG. 1, wherein FIG. 3A is a side view, and FIG. 3B is a cross-sectional view taken along line IIIB-IIIB of FIG.
4A and 4B schematically show the operation of the crushing apparatus main body of FIG. 3; FIG. 4A shows the IV of FIG. 3A regarding the crushing apparatus main body in an initial position before accommodating an object to be crushed; (B) is a cross-sectional explanatory view similar to (a) of the crushing apparatus main body in a state where the crushing operation of the crushable object is almost completed, and (c) is a sheet-like material having a thin crushable object. FIG. 4 is a cross-sectional explanatory view similar to FIG.
5 shows the operation of the crushing device main body when a plurality of cylinder devices of the crushing device main body are double-acting hydraulic cylinder devices, wherein (a) is a cross-sectional description similar to (a) of FIG. 4 (b) is a sectional explanatory view similar to FIG. 4 (b), and FIG. 4 (c) is a sectional explanatory view similar to FIG. 4 (c).
[Explanation of symbols]
1,1q hard disk crusher
2 outer case
3,3q crusher body
4 Main switch
5 Start button
10 Box for storing crushed objects
12A, 12B, 12C, 12D Opening
18 Compressed curing storage medium storage area
19A, 19B, 19C, 19D Receiving part
20 Crushing mechanism
20A, 20B, 20C, 20D, 20qB, 20qD Hydraulic cylinder device
30, 30q Cylinder block
30A, 30B, 30C, 30D Cylinder device main body
31A, 31B, 31C, 31D Cylinder hole
33A, 33B, 33C, 33D Head side oil chamber
34A, 34B, 34C, 34D Hydraulic oil supply and discharge holes
35 Main supply / drain hole (head side common port)
35A, 35B, 35C, 35D Communication hole
37B, 37D Rod side oil chamber
40A, 40B, 40C, 40D piston structure
41A, 41B, 41C, 41D piston
42A, 42B, 42C, 42D Piston rod
50A, 50B, 50C, 50D Crushing tool
60A, 60B, 60C, 60D Return spring
70 Crush mechanism drive unit
71 Electric motor
80 Hydraulic pump unit
90 Control unit
B1, B2 direction
W crushed object
W11 weak part
W12 Strong part

Claims (9)

A fluid pressure cylinder body and a piston reciprocally slidably fitted into the cylinder hole so as to form a volume variable fluid chamber in the cylinder hole of the body; and a piston connected at one end to the piston at an opposite side to the fluid chamber. A crushing device comprising a plurality of hydraulic cylinder devices having a piston rod extending along the cylinder hole and projecting outside the cylinder hole,
A crushing tool is formed at the protruding end of each piston rod,
The hydraulic cylinder bodies of the plurality of hydraulic cylinder devices are integrally fixed to each other,
A crushing device in which the variable volume fluid chambers of a plurality of hydraulic cylinder devices communicate with each other. The crushing device according to claim 1, further comprising a crushable object disposing portion for disposing the crushable object integrally with the fluid pressure cylinder main body. A cylinder block formed with a plurality of cylinder holes that are mutually communicated by a communication port at each one end side,
A piston reciprocally slidably inserted into each cylinder hole so as to form a fluid chamber including the communication port in each cylinder hole, and a piston connected at one end to the piston along the cylinder hole on a side opposite to the fluid chamber. A piston rod extending and protruding out of the cylinder hole,
A crushing tool formed at the protruding end of each piston rod. 4. The crushing device according to claim 3, wherein a crushable object disposing portion for disposing the crushable object is provided integrally with the cylinder block. The crushing apparatus according to claim 2, wherein the object to be destroyed is an information recording medium. 6. A crushing device according to claim 1, wherein a plurality of piston rods extend parallel to one another. 7. The hydraulic cylinder device according to claim 1, wherein the hydraulic cylinder device is a single-acting hydraulic cylinder, and the hydraulic cylinder device includes a return spring acting in a direction to retract the piston rod into the cylinder bore. Crushing equipment. The crushing device according to any one of claims 1 to 6, wherein the plurality of hydraulic cylinder devices are double-acting hydraulic cylinder devices. 9. The crushing device according to claim 1, wherein the fluid pressure is a hydraulic pressure.

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